TIL in 1958 a nighttime training exercise resulted in a mid-air collision between an F-86 Sabre and a B-47 Startojet. To save the aircraft, the B-47 crew ditched their nuclear payload to save weight. The undetonated weapon is believed to have sunk near Tybee Island and remains unrecovered today.

https://en.wikipedia.org/wiki/1958_Tybee_Island_mid-air_collision

https://www.reddit.com/r/todayilearned/comments/156oba7/til_in_1958_a_nighttime_training_exercise/